Homeostasis & Feedback

Front

What is Homeostasis?

Back

Homeostasis is the maintenance of a relatively stable internal environment.

Front

What is a normal blood glucose (sugar) level?

Back

A normal blood glucose level is 90 mg/100 mL.

Front

Why does pulse rate increase during exercise?

Back

Pulse rate increases during exercise because gas exchange must happen more quickly than when a person is at rest.

Front

What is the 'cause' for something to happen?

Back

The 'cause' for something to happen is called the stimulus.

Front

How does feedback regulation relate to homeostasis?

Back

Homeostasis often incorporates a form of feedback regulation to maintain a stable internal environment.

Front

What is the role of the stimulus in homeostasis?

Back

The stimulus triggers a response to help maintain homeostasis.

Front

What happens to body temperature during exercise?

Back

Body temperature increases during exercise, prompting mechanisms to cool the body down.

Front

What is negative feedback in homeostasis?

Back

Negative feedback is a process that counteracts a change in a physiological variable to maintain homeostasis.

Front

What is positive feedback in biological systems?

Back

Positive feedback amplifies a response or process, moving the system away from its starting state.

Front

How does the body respond to high blood sugar levels?

Back

The body responds to high blood sugar levels by releasing insulin to lower glucose levels.